I have a treadmill that keeps tripping the power circuit as soon as it is turned on. It was working fine up until a few weeks ago and it is regularly maintained, silicone spray under belt etc. When I took it apart, I found a long screw had fallen into the space beside the controller board and I suspect this has shorted something. There was a scorch mark near the bridge rectifier and the main cap looked slightly swollen, otherwise no visual damage to the board. I replaced both of these components but the problem persists. As soon as I turn it on at the wall, it blows the breaker. I've isolated the motor and tested it with a drill battery and the motor seems to run fine. I've checked for shorts against the frame and everything looks fine - no wires frayed or out of place.
Any suggestions as to what to try next.
Any suggestions as to what to try next.